由相对不确定度研究气体比热容比的测量仪器选择  

The Instrument Choice of Gas Specific Heat Ratio by the Relative Uncertainty

作　　者：顾媛媛[1] 吴国兴[1] 符跃鸣[1] 陆惠[1] 崔岩[1] 

机构地区：[1]上海师范大学天华学院,上海201815

出　　处：《大学物理实验》2012年第6期89-91,共3页Physical Experiment of College

基　　金：2011年上海市教委重点课程项目

摘　　要：该实验利用测量气体比热容比的经典装置,证明小球装置中做简谐振动,并依据周期推导气体比热容比理论公式,分析了测定气体比热容比的误差来源采用计算机实时测量技术获得气体在任意时刻的压强,利用比热容比的相对不确定度确定了测量仪器,从而利用精确的测量量求得气体比热容比值,利用确定的仪器测量,最终实验相对百分误差控制在0.5%。The experiment uses classic device of measuring gas specific heat ratio,which proves that do simple harmonic vibration in ball device,and the gas heat capacity ratio of theoretical formulae are derived according to cycle,and analyzes the error sources of determination gas specific heat ratio,and attains the pressure of gas in arbitrary time using the computer real time measurement technology,and determinates measuring instruments using the relative uncertainty of the heat capacity ratio,thus obtains gas specific heat capacity ratio using precise measurements,the final experimental relative percent error control in 0.5% using determined measuring instruments.

关 键 词：比热容比 周期测定仪 不确定度 相对误差 传感器 

分 类 号：O433[机械工程—光学工程]